Calculation of Buffer Size on Critical Chain Based on Duration Distribution, Multiresource Constraints, and Relay Potential

Table 3

Buffer calculation.

Type of activities	Serial number of activities	Activity number	Three-parameter β distribution	b-m	Median (T50%)	T95%	Safety time sti	Resource impact coefficient Ri	Relay potential G	Free float FF	The initial buffer B	The remaining buffer K	Feeding buffer FB	Project buffer PB
Critical chain activity	1	A	(1, 2, 3)	1	1.98	2.63	0.65	1.48		0	4.71			5.97
	2	B	(4, 6, 9)	3	6.14	7.8	1.66	0.59	0.39	0
	4	D	(2, 4, 7)	3	4.13	5.77	1.64	1.36	0.26	0
	5	E	(5, 8, 12)	4	8.13	10.4	2.27	1.54	0.57	0
	9	I	(2, 4, 7)	3	4.1	5.75	1.65	1.17	−0.1	0
Non-critical chain activity	3	C	(2, 3, 5)	2	3.14	4.18	1.04	0.11	−0.21	3
	7	G	(3, 5, 8)	3	5.11	6.81	1.7	0.48	0.72	1	2.26	1.26	1
	6	F	(2, 4, 6)	2	4.02	5.22	1.2	0.42	0	4.14	1.7	0	1.7
	8	H	(1, 4, 6)	2	3.91	5.33	1.42	0.48	0.29	0.19	1.81	0	1.81